Fuse setting machine



W 142-. G. W. BEATTY 2304,90

FUSE SETTING MACHINE Filed March 23, 1940 2 Sheets-Sheet 1 4. I6 10' I2 13 U 49 Inventor Gan-H512. \nLbanHl 2yv M T A E B W G FUSE SETTING MACHINE Filed March 23, 1940 2 Sheets-Sheet 2 Irv/emigr- E EEII" a W. anti Att 1: TLE 5 atented Dec. 15, 1942 IED STATES PATENT OFFICE (Granted under the act of March 3, 1883, as

amended April 30, 1928; 370 O. G. 757) 6 Claims.

The invention described herein may be manufactured and used by or for the Government for governmental purposes, without the payment to me of any royalty thereon.

This invention relates to a fuse setting machine of the type which is provided with two relatively rotatable adjusting members adapted to be coupled to a fixed and a movable part of the fuse in a round of ammunition.

The principal object of the present invention is to simplify the mechanism and eliminate a number of the elements found in prior machines. This is accomplished by providing a novel arrangement in which the holding pawl of the adjusting member is associated with the driving gear wheel and is manually retractable.

Other objects are to provide a machine having parts which may be readily substituted according to the various types of ammunition which are to be used and to provide means for matching index members by angular displacement of the receiver motor of an electrical transmission system.

The specific nature of the invention as well as other objects and advantages thereof will clearly appear from a description of a preferred embodiment as shown in the accompanying drawings in which:

Fig. l is a view in side elevation of the improved machine;

Fig. 2 is a longitudinal sectional view;

Fig. 3 is a sectional view on the line 33 of Fig.

Fig. 4 is a detail view in elevation of the gear wheel;

Fig. 5 is a sectional view on the line 55 of Fig. 3;

Fig. 6 is a sectional view of the indicator unit;

Fig. 7 is a View in side elevation of one type of fuse for which the machine is designed.

The fuse setter comprises a housing 5 which is adapted to be mounted on a support and carries a casing 6 by means of a hinged connection 1. These two members are locked together by a pivoted bolt 8 and a wing nut 9.

Within the housing 5 and casing 6 are respectively mounted adjusting members It and II which are independently rotatable about the axis of the machine. The adjacent ends of the adjusting members It and H are provided with rings l2 and i3 respectively which are removably secured to their corresponding members, for example, by screws M. The ring l2 carries a spring-pressed pawl [5 for engaging a lug or notch A in the rotatable time ring B of a fuse, as

tion of the pawls l5 and I6 is dependent on the type of ammunition employed.

The adjusting member It] includes a worm wheel ll whereby it is driven from a worm l8 on an operating shaft i9 including a handwheel l 9a. A spiral gear 20 fixed to the adjusting member ID is in mesh with a spiral gear 2| which is disposed within an inner case 22 that is mounted in an outer case 23 forming part of housing 5. A receiver motor 24 of a synchronous system whose transmitter motor is at a remote data computing station, is rotatably mounted in the inner casing 22. A plate 25 secured to the front end of the motor by screws 26 is formed with a flange 21 encircling the motor and provided with gear teeth 28. The plate also has a projecting hollow stud 29 which serves to mount a plate 30 carrying the spiral gear 2|.

The rotor shaft 3| of the motor extends through the hollow stud and carries a hub 32 to which is secured a disk 33 having an index 34. A shaft 35 mounted in the inner case carries a worm 36 which meshes with the teeth 28 to angularly displace the motor and with it the index 34 on the disk 33 for the purpose of synchronizing the index 34 with index 4!. A flexible shaft 3'! connected to the shaft 35 extends into one of a pair of chambers 38-38 for electric lights E and includes a rigid head 39 whereby it may be turned by an appropriate tool.

The plate 33 carries a plurality of posts 40, only one being shown, which carry a ring 40 disposed concentrically with and on the outside of the disk 33. The ring 40 is provided with an index 41 readable against the index 34 and also against a scale 42 which is provided on a ring 43. The ring is replaceably held by screws 43 on the front edge of the inner casing and may be readily substituted according to the particular ammunition to be used. A frame 54 secured to the outer case 23 carries a transparent window 45. The inner case 22 is provided with apertures 46 so that illumination from the lights E may be directed to the face of the dial.

Referring to Fig. 2 the adjusting member ll adapted to receive the round of ammunition, is

rotatably mounted within the casing 6 by means of anti-friction bearings, one bearing 41 being carried by the casing 6 and the other bearing 48 being carried by a flared guide 49 which is secured to the end of the casing 6 and extends into the adjusting member II. The adjusting member is provided adjacent its inner end with a gear 50 which is in mesh with a gear wheel 5| having a shaft 52 mounted in a cover plate 53 secured to the casing and rotated by means of a crank handle 54. One revolution of the gear wheel imparts two revolutions to the adjusting member.

The cover plate includes a housing 55 in which a pawl 56 is mounted on a pivot pin 51 and is acted on by a spring 58 which normally urges the pawl towards the gear wheel 51 and projects it through an aperture 59 in the gear wheel when the gear wheel assumes a predetermined angular position. The inner end of the pawl engages a stop shoulder 60 disposed in a cam track 61 on the adjusting member II. When the pawl is withdrawn from engagement with the adjusting member and retracted through the gear wheel, the gear wheel is free to rotate the adjusting member. The pawl carries a roller 62 which rides on a track 63 on the gear wheel to hold the pawl in retracted position.

The means for initiating withdrawal of the pawl consists of a trip lever 64 fixed on a pivot pin 65 in the upper part of the housing 55. A spring 65 normally holds the lever against the inner wall of the housing where it is positioned in front of an arm 67 on the pawl. A handle 68 fixed on the pivot pin 65 is provided for manually actuating the trip lever to retract the pawl.

The cam track 6! includes a second stop shoulder 59 for engagement by a spring-pressed pawl it mounted in the casing 6. With the pawl 56 retracted the pawl 10 permits rotation of the adjusting member in only one direction and it also serves to prevent rebound of the adjusting memher when the pawl 56 engages stop shoulder Gil. The stop shoulders 60 and 69 are accurately located with relation to the pawl IE to maintain the initial position of pawl I6 with relation to pawl l5, as this is essential for accurate setting of the fuse.

The setting of the fuse is accomplished by causing the adjusting member I l to carry out two complete revolutions while the member it! is either stationary or under continuous operation. When the member H is coupled to the round of ammunition by engagement of pawl it with fixed lug r notch C, the round will be rotated.

Since the time ring B of the fuse is rotatable with the round the lug or notch A of the time ring will sooner or later be in position to be engaged by the pawl l of the adjusting member P21. When this occurs the angular displacement of the time ring will be under control of the adjusting member ID and it will assume an angular position relative to the predetermined position of the adjusting member Ii. The purpose of turning the member H through two revolutions is to insure coupling of the adjusting members with the lugs or notches A and C irrespective of their position relative to each other and to the adjusting members at the commencement of the operation.

Rotation of the adjusting member II is eifected by an operator who maintains pressure on the crank handle 54 to rotate it in a counterclockwise direction. The crank handle can only be moved, however, when the loading operator, after inserting a round of ammunition into the machine strikes the handle 68 to actuate the trip lever 66 and retract the pawl 56. After initial movement of the gear wheel the pawl is maintained in retracted position by engagement of the roller 62 which rides on the track 63 of gear wheel iii. At the termination of a complete revolution of gear wheel til the aperture 59 is in position to permit passage of the pawl 56 and re-engagement with the adjusting member H.

I claim:

1. A fuse setting machine comprising a casing, a rotatable adjusting member mounted in the casing and including a gear and a stop shoulder, a cover on the casing, a gear wheel carried by the cover and meshing with the gear on the adjusting member, said gear wheel having an aperture, a pawl carried by the cover in position to project through the aperture in the gear wheel and engage the stop shoulder of the adjusting member, a spring normally urging the pawl towards the gear wheel, and a trip lever carried by the cover and engageable with the pawl to retract it through the aperture in the gear wheel.

2. A fuse setting machine comprising a casing, a rotatable adjusting member mounted in the casing and including a gear and a stop shoulder, a gear wheel carried by the casing and meshing with the gear on the adjusting member, said gear Wheel having an aperture, a pawl carried by the casing in position to project through the aperture in the gear wheel and engage the stop shoulder of the adjusting member, a spring normally urging the pawl towards the gear wheel, and a trip lever carried by the casing and engageable with the pawl to retract it through the aperture in the gear wheel.

3. A fuse setting machine comprising a casing, a rotatable adjusting member mounted in the casing and including a gear and a stop shoulder, a gear wheel meshing with the gear on the adjusting member, said gear wheel having an aperture, a pawl carried by the casing in position to project through the aperture in the gear wheel and engage the stop shoulder, a spring normally urging the pawl towards the gear wheel, a roller carried by the pawl for engaging the gear wheel, and means for retracting the pawl through the aperture in the gear wheel.

4. A fuse setting machine comprising a casing, a rotatable adjusting member mounted in the casing and including a gear and a stop shoulder, a gear wheel meshing with the gear on the adjusting member, a pawl carried by the casing, a

7 spring normally urging the pawl to engagement with the stop shoulder, means for retracting the pawl, and means on the pawl engageable with the gear wheel to hold the pawl in retracted position during a portion of the revolution of the gear wheel.

5. A fuse setting machine comprising a casing, a rotatable adjusting member mounted in the casing and including a gear and a stop shoulder, a gear wheel meshing with the gear on the adjusting member, an aperture in the gear wheel, a pawl carried by the casing and adapted to be projected through said aperture, a spring normally urging the pawl to engagement with the stop shoulder, and a trip lever for retracting the pawl.

6. In a fuse setting machine, a housing, a rotatable adjusting member in the housing, a receiver motor of a synchronous electrical transmission system, said motor having a casing and a shaft rotatable with respect to said casing for rotating the motor casing, an index member angularly displaceable by the motor shaft, and a second index member angularly displaceable by the adjusting member and mounted adjacent the first index member.

GEORGE W. BEATTY. 

